Union check-valve.



F. 0. LlNDGRE N. UNION CHECK VALVE. APPLICATION FILED DEC. 16, 1916- FRED o. LINDGREN, or RIDGWAY, PENNSYLVANIA.

UNION CHECK-VALVE.

Specification of Letters Patent.

Patented Dec. 3, 1918.

Application filed December 16, 1916. Serial No. 137,361.

To all whom it may concern:

Be it known that I, FRED O. LINDGREN, a citizen of the United States, residing at Ridgway, in the county of Elk and State of Pennsylvania, have invented certain new and useful Improvements in Union Check- Valves; and I do hereby declare the following to be a full, clear, and exact description of-the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a union check valve, and has for its principal obiect to improve and simplify the construction of a valve of this character so that it will be of durable and substantial design, and of comparatively inexpensive construction.

Another object of the invention is to pro vide a union check valve in which the valve seat can be readily and'quickly removed in order that the same may be reground to provide a new check valve seat.

A further object of the invention is to provide a valve seat proper with an opening the same diameter as the opening through the first and second member of the valve, whereby a direct flow of water the full size of the pipe to which the valve is connected, may freely flow through the valve.

A still further object of the invention is the provision of a valve of the above stated character embodying a valve seat, and a check valve pivotally supported upon the valve seat and rotatably mounted on its support, whereby the valve may be rotated at will in order to effectively cooperate with the valve seat to prevent leakage therebetween.

With these and other objects in view, as will appear as the description proceeds, the

IIIVGDiZlOII comprises the various novel features of construction, combinationv and arrangement of parts as will be more fully de-' scribed hereinafter and set forth with particularity in the appended claim,

Referring to the drawings,

Figure 1 is a vertical horizontal sectional view through my improved union check valve.

Fig. 2 is an end elevation thereof.

Fig. 3 is an end elevation of the valve seat, showing the check valve arranged in operative position. I

Fig. 4 is an end view of the valve seat with the check valve removed, and.

ings,

Fig. 5 is an end elevation of the check valve hinge strap.

Similar characters of reference are used to denote like parts throughout the accour panying drawings and the following description.

Referring more particularlv to the drawthe reference numeral 1 indicates a member of my improved union check valve and has the outer free end formed externally into hexagonal shapes as i-ldicaterl bv the reference numeral 2. whereby a wrench may be applied to hold the member in assembling the device. This outer end of the member is threaded internally as indicated at 3. and communicates with the interior 4', while the opposite end of the member is enlargedcircumferentiallv. and formed with external threads 5. The end ed e of th s end is inclined radially inwardly as indicated by the reference numeral 6, a shoulder 7 being formed in the inner circumferential edge of the member and against which is designed to rest the circumferential flange 8 of the valve seat 9, which latter is provided with external threads 10 whereby the valve seat may be threadedlv connected within the inner end of the member. This valve seat 9 is provided in its outer end with a nonsquare recess 11 in which a suitable tool may be inserted in order to screw the valve seat in the member 1 or as may be desired. This valve seat 9 is' further provided with an opening 12 that is of the same diameter as the threaded opening 3 in the outer end of the member 1 and extends entirely through the valve seat.

The inner end of the valve seat 9 is provided on its outer circumferential surface with an upstanding apertured lug 13, which is embraced by the arms 14 of a bifurcated end of a hinge strap 15, a suitable hinge pin 16 passing through the arms 14 and the lug 13, whereby the hinge strap may have a free swinging movement. The outer end of the hinge strap is formed with an apertured boss 15*. A rotatable check valve 17 is providcd centrally on opposite sides with bosses which form a central hub 17 to' which is attached the lower end of the hinge strap 15 through the medium of a threaded stud 18 that is anchored within the hub 17 of the check valve and extends through the boss 15 and the lower end of the hinge strap 15, the outer end of this bolt being remove it th erefrom seen that the change of the: angular relation '1 will -be apparent provided with a nut 19'Whereby the check valve may be rotated and then clamped in the desired rotated position. construction it Will be apparent that When the lower portion of the check valve 17 becomes Worn, so as to ineffectively close the opening 12 from the valve seat 9, it can be readily rotated andthen adjusted in this rotated position so as to present an llIlWOIIl surface at the lower portion of the opening 12, thusmaking it possible to cause the check valve to Wear evenly around its circumfer ential edge.

When it is found necessary to grind the valve seat and the co-engaging surface of the check valve so as to 'form a perfect seal between the valve andits seat, theco-engaging faces'of the valve hub and the boss 15 may be likewise ground so as to permit the'boss 15 to bear evenly after-it has been ground:and-arranged in operative position Therefore itqvill be of the valve 'with,respect to-"its' seat'and the boss 15* with: res'pect to By threadedly connecting the valve seat 9 Within. the-inner end of the-member 1 it that it can be'readily re movedv so 'that thecheckvalve seat can be i ground or the check valve --repla cedas the tween these endedges of the first and second lease may be.- in a very 35.

y of producing an entire new union valve,- the provision of the ner, and then replaced-without the-necessity y T '8, it Will be" apparent that it is possible to formed hexagonally by a suitable tool may I member in assembling insert-a tool in a non-squarerecess screwthe valve seat nw ardly of the mem her so as to cause the flange 8 to, engage the member.

With-the inner end ofthe member 1 is a second member 20 which is provided in its outer endwith an internally threaded opening 21 that communicates with the internally outvvardly"flared opening 22 in the opposite end of the second member. The outer end of the second member is circumferential wvherethe device. 1This sec- 0nd member 20 providedcircumferenftially and adjacent the; hexagonal end 23 with a shoulder 24: WlliChiS disposed directly on the inner inner. vend behind a circumferential flange 25 formed end-of thesecond member;- The v ,edge ofthe second-member is beveled radially outwardly as indicated by numeral 26 nd is designed to engage and co- "foperate'vvlth the vinwardly beveled or incli'n'ed' end edge of the member 1.

' Copies of this patent may b'obta i iid Fron1"this""employ a union sleeve on the valve hub a. the valvehub 17; wi-llbe compensated fo t thegrinding 0t the .co-enga'ging faces of the hub and v a boss 15.

ready and quick mancircumferential flange 11 and be used to hold the to hold" and"reta in' the. second with the member 27, that is provided at one endwi'th internally projecting flange 28 that is designed to engage behind the circumferential flange 25 and rest upon the shoulder 24 of the second member. The opposite end of the union sleeveisfprovided with an internally threaded opening 29, Whichis of a diameter slightly larger than the diameter of theopenin'g formedby the internally projecting flange 28, so that the sleeve .may be threadedly connected on to I the external threads 5 ofthe member 1. By rotatingand securing the union sleeve 27 upon the firstmember, it Will'be manifest that the inner end edge of the-second member Will be dravvn into close contact with the-inner end edge of the firstmember,

ln order member in engagement Within the first and second members. A

11i ordento facilitatethe easy and r'eady rotation of the -iunionsleeve 27-, I provide recesses 30 in the outer ci-rcumferential edge any other;#suitableitoolcnray beyinsert'ed to flectively rotate the sleeve.

While -I; '-have shown the beveledlface or end edge of the secondgmemben engaging the-beveled end/edge of the ifirst member, I desire to have it understood that if desired a suitable backing be introduced be- 4 embers in-orderrto providea better-joint f therebetween. v t- Annioncheck valve for aI single .pipe line having the same diameter throughout comprising apair of enlarged tubularabntting members having their outer -endsinternally 1 threaded for the-reception of the ends of the pipeline sections,- --'uni'on sleeve encir- I cling and-threadedl-y connecting; said {tubularabutting members,- a tubular valve seat threaded into the inner end" and projecting into-one ofsaidpair of tubular members and having an insidediameter the same as the inside diameter of the pipe line whereby thedirect flow of fluidcanpass through the union-check valve, ai'hinge strap pivotally I connected' tothe valve-seat at a point removed from its inner end -and a check valve rotatably supportedibysaidghin-gestrap to bear against theinner end of said valveseat and close the passage'therethrough.

In testimony vvhereof I ha-vejsigned my two subscribingwitnesses.

-W b iie se a I I J; N. TYROXELL,

J. M. HANSCOM.

- thus-completely" housing the valve seat .9

of the sleeve vvhereby'a spanner wrench or FRED o. innennn.

r five cents each, by addressing the Commissioner of 'Patents, 3

. washingtomnc. 

